PC crashing - need suggestions ASAP

All right, this is the deal - for the past couple of months my PC started showing signs of overheating (the fan on the GPU would go apeshit if I play some DX11 game... or any game for that matter) and would shut itself off in order to cool down. Now, upon realizing this I decided to do something about it and clean my GPU thoroughly. Needles to say, it was choking on so much dust, it was ridiculous.

Everything was fine after the clean up for several days, though the problems returned shortly after. No matter what type of game I play (recently tried Crysis 2, Crysis 3 and Brutal Legend \../) it will be fine for about 10 minutes until a crash occurs... and this is the main problem - there's no crash dump file, no BSOD screen... NOTHING. It is as if I reset the computer from the power button. Happens every god damn time and it is driving me crazy. I cannot play anything and I don't know what to do.

Some tech-savvy friends suggested I get a new PSU (since mine is 3 years old and its been through a LOT) though I cannot really confirm if that's the reason since I don't have a back up PSU to swap.

My current PSU is some Hantoll 750W crap I got for cheap (i was kinda running low on cash when I bought it, served me good up till now I think). The CPU is fine I believe, have been monitoring it with Avalanche.

My current PSU is some Hantoll 750W crap I got for cheap (i was kinda running low on cash when I bought it, served me good up till now I think). The CPU is fine I believe, have been monitoring it with Avalanche.

No of course you can't see the psu model in hwmonitor. Whats your 12V, 3.3V & 5V rail at in hwmonitor?

12V - 10,560 V
3.3V - 3.280 V
5V - 5,192 V

Though I just noticed that my CPU temp goes a bit too hot I am afraid. Now it is at 98 degrees C and growing. I believe the processor is causing the shut down due to overheating. God damn it! The cooler is no more than a year old and it is huge. Guess size doesn't matter after-all.

Edit: Yep. PC died soon after. Last checked temp was around 105 C. I might have to change the cooler... or something.

Though I just noticed that my CPU temp goes a bit too hot I am afraid. Now it is at 98 degrees C and growing. I believe the processor is causing the shut down due to overheating. God damn it! The cooler is no more than a year old and it is huge. Guess size doesn't matter after-all.

Edit: Yep. PC died soon after. Last checked temp was around 105 C. I might have to change the cooler... or something.

There is no way with any cpu cooler you can get that high in temperature. i think cooler isnt mounted properly or its detached

It could also be your thermal paste that has dried out after extensive periods of overheating. My laptop had exactly the same issues you are describing in the op, and after trying all other things i took it apart and cleaned/reapplied new thermal paste i ordered over the internet and all my problems went away, the core temp all dropped with at least 20-40c each.